Y99.9
Billable codeUnspecified external cause status
The ICD-10 code for unspecified external cause status is Y99.9.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Y99.0Civilian activity done for income or pay
- Y99.1Military activity
- Y99.2Volunteer activity
- Y99.8Other external cause status
- Y99.9Unspecified external cause status
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- E0009